<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span
          v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
          class="no-redirect"
        >
          {{ item.meta.title }}
        </span>
        <a href="#" v-else @click.prevent="handleLink(item)">
          {{ item.meta.title }}
        </a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>
<script>
  export default {
    name: 'breadcrumb',
    data() {
      return {
        levelList: null,
      }
    },
    watch: {
      $route(route) {
        // if (route.path.startsWith(this.levelList[1].redirect)) {
        //   return
        // }
        this.getBreadcrumb()
      },
    },
    created() {
      this.getBreadcrumb()
    },
    methods: {
      getBreadcrumb() {
        // return []
        let matched = this.$route.matched.filter(
          (item) =>
            item.meta &&
            item.meta.title &&
            item.meta.hiddenWithBreadcrumb !== true
        )
        matched = [{ path: '/', meta: { title: '主页' } }].concat(matched)
        this.levelList = matched
      },
      isHome(route) {
        const name = route && route.name
        if (!name) {
          return false
        }
        return name.trim().toLocaleLowerCase() === 'home'.toLocaleLowerCase()
      },
      handleLink(item) {
        const { redirect, path, name } = item
        if (path === '/') {
          this.$router.push({ path })
        } else {
          if (redirect) {
            this.$router.push({ name: redirect })
            return
          }
          this.$router.push({ name })
        }
      },
    },
  }
</script>
<style lang="scss" scoped>
  .app-breadcrumb.el-breadcrumb {
    display: inline-block;
    font-size: 14px;
    line-height: 50px;
    margin-left: 8px;

    .no-redirect {
      color: #97a8be;
      cursor: text;
    }
  }
</style>
